The method of Teaching for Abstraction was applied in grades 2 and 4 to individual teaching interviews focusing on the angle concept. Responses of three students who successfully matched different physical angle situations are compared to responses of three that did not. The teaching method was generally supported, but it appears that more emphasis needs to be given to the examination of within-situation and within-context similarities before matching across contexts, and hence abstraction of the angle concept, can proceed. (Contains 10 references and 1 figure.) (Author)